Outcome: respiratory complication (respiratory failure, pneumonia, atelectasis requiring bronchoscopy, pulmonary embolism or need for supplemental oxygen)
Parameters:
(1) age in years
(2) predicted postoperative FEV1 in percent
(3) smoking status
predicted postoperative function =
= (preoperative measured FEV1 as percent of predicted) * (1 - ((number of segments resected) / (total number of segments)))
where:
• The right lung has 10 segments. The left lung is reported of having from 8 to 10 segments depending on how they are defined.
|
Smoking Status
|
Points
|
|
never
|
0
|
|
ex-smoker
|
35
|
|
current smoker
|
50
|
total score =
= (age in years) - (postoperative FEV1) + (points for smoking status)
Interpretation:
• minimum observed: -70.9
• maximum observed: 88.4
• A score >= 30 is high-risk for respiratory complications.
Performance:
• The area under the ROC curve is 0.74.
• At the cut-off the sensitivity was 80% and specificity 61%.
